The Audi AGA is a 1,781 cc, inline-four petrol engine produced between 1989 and 1994. It belongs to Audi's EA827 engine family and features a single overhead camshaft (SOHC) with 8 valves, along with multi-point fuel injection (MPI). In standard tune, it delivers 66 kW (90 PS) at 5,800 rpm and 148 Nm of torque at 3,500 rpm, offering reliable performance for compact and mid-size models.
Used in the Audi 80 (B3) and Audi Cabriolet (B3), the AGA was engineered for fuel-efficient daily driving and light-load operation. It was designed to meet pre-Euro emissions standards, relying on a catalytic converter and lambda feedback system for emissions control. Its naturally aspirated design and SOHC valvetrain prioritized simplicity and durability over high specific output.
One documented concern is premature camshaft wear observed in early production units, particularly under sustained high-load conditions. This issue was addressed in Audi Service Information Bulletin 01.1 89, which recommended revised camshaft materials and updated oil pump calibration. Later production engines incorporated these changes to improve long-term reliability.
Production years 1989–1992 meet pre-Euro standards; 1993–1994 models comply with Euro 1 (VCA UK Type Approval #VCA/EMS/5679).
The Audi AGA is a 1,781 cc inline-four petrol engine engineered for compact and entry-level executive models (1989–1994). It combines multi-point fuel injection with SOHC valvetrain technology to deliver reliable urban performance and modest fuel consumption. Designed to meet Euro 1 emissions standards (for 1993+ models), it balances durability with low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,781 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 86.4 mm | |
| Power output | 66 kW (90 PS) @ 5,800 rpm | |
| Torque | 148 Nm @ 3,500 rpm | |
| Fuel system | Bosch Motronic M2.5 MPI | |
| Emissions standard | Euro 1 (1993–1994 models) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | N/A | |
| Timing system | Timing belt (non-interference design) | |
| Oil type | SAE 10W-40, API SG/CD | |
| Dry weight | 132 kg |
The naturally aspirated design provides linear throttle response ideal for city driving but requires strict adherence to 60,000 km timing belt replacement intervals to prevent valve interference. SAE 10W-40 oil meeting API SG/CD is recommended to ensure adequate camshaft lubrication under load. Fuel quality should meet EN 228 standards to maintain Motronic system longevity. Post-1992 models feature revised camshaft hardening and oil pump calibration, reducing wear risk. Catalytic converters on Euro 1 models are sensitive to leaded fuel; only unleaded petrol should be used. Lambda sensor maintenance is essential to prevent drivability issues and failed emissions tests.
Oil Specs: Requires SAE 10W-40, API SG/CD specification (Audi SIB 01.1 89). Compatible with ACEA A2-96.
Emissions: Euro 1 certification applies to 1993–1994 models only (VCA Type Approval #VCA/EMS/5679). Pre-1993 models meet domestic EU pre-regulation standards.
Power Ratings: Measured under DIN 70020 standards. Output consistent across all markets (Audi Group PT-1990).
Audi Technical Information System (TIS): Docs A18720, A19005, SIB 01.1 89
VCA Type Approval Database (VCA/EMS/5679)
ISO 1585: Road vehicles — Test method for the measurement of specific power
The Audi AGA was used across Audi's B3 platform with longitudinal mounting. This engine received platform-specific adaptations-shorter intake manifolds in the 80 and revised exhaust routing in the Cabriolet-and from 1993 the facelifted 80 models adopted the Euro 1-compliant variant with updated catalytic converter, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the timing belt cover (Audi TIS A18800). The 7th VIN digit indicates engine type ('G' for AGA in B3 chassis). Pre-1992 models have silver valve covers with ribbed finish; post-1992 units use smooth black covers. Critical differentiation from AEL/ABF: AGA uses Bosch Motronic M2.5 ECU with square diagnostic connector, while ABF uses M2.8.1 with trapezoidal port. Service parts require chassis verification—timing belts for B3 80 are incompatible with B3 Cabriolet due to different accessory drive layouts (Audi SIB 02.3 91).
The AGA's primary reliability risk is camshaft wear in early production units, with elevated incidence in high-mileage or poorly maintained vehicles. Audi internal quality reports from 1990 noted increased warranty claims for cam lobe deterioration, while UK DVSA MOT data shows a notable share of emissions failures linked to degraded lambda control in pre-1993 models. Extended oil intervals and low-RPM operation increase wear risk, making adherence to service schedules and use of correct oil critical.
Analysis derived from Audi technical bulletins (1989-1994) and UK DVSA failure statistics (1990-1995). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI AGA.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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